851343953 has 4 divisors (see below), whose sum is σ = 851821620. Its totient is φ = 850866288.

The previous prime is 851343949. The next prime is 851343991. The reversal of 851343953 is 359343158.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 827597824 + 23746129 = 28768^2 + 4873^2 .

It is a cyclic number.

It is not a de Polignac number, because 851343953 - 2² = 851343949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851343953.

It is not an unprimeable number, because it can be changed into a prime (851343653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236150 + ... + 239727.

It is an arithmetic number, because the mean of its divisors is an integer number (212955405).

Almost surely, 2^851343953 is an apocalyptic number.

It is an amenable number.

851343953 is a deficient number, since it is larger than the sum of its proper divisors (477667).

851343953 is a wasteful number, since it uses less digits than its factorization.

851343953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477666.

The product of its digits is 194400, while the sum is 41.

The square root of 851343953 is about 29177.7989745628. The cubic root of 851343953 is about 947.7672229158.

The spelling of 851343953 in words is "eight hundred fifty-one million, three hundred forty-three thousand, nine hundred fifty-three".